Color stone



FIG. 1 is a top plan view of a color stone showing my new design;

FIG. 2 is a front elevational view thereof, that is also typical of theside views, such as the right side view and left side view thereof, andthat is also typical of the rear view thereof; and,

FIG. 3 is a bottom plan view thereof.

The ornamental design for a color stone, as shown and described. 